415 lines
17 KiB
Plaintext
415 lines
17 KiB
Plaintext
import 'unorm' as unorm
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import './support/glyph' as Glyph
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import './support/stroke' as Stroke
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import './support/spirokit' as spirokit
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import './support/transform' as : Transform && [object [transformPoint tp] [untransform utp] inverse]
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import './support/anchor' as Anchor
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extern global
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### File inclusion macro
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define-macro $$include : syntax-rules
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{'$$include' {'.quote' file}} : begin
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local path : require 'path'
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local fs : require 'fs'
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local f0 [[env.macros.get 'input-path']].1
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local parse [require './syntax.js'].parse
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local absolutePath : path.resolve [path.dirname f0] [formOf file]
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local input : fs.readFileSync absolutePath 'utf-8'
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local ast : parse input {.within {.file absolutePath .input input}}
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return {'.syntactic-closure' ast env}
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otherwise `nothing
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# A symbol block defines a group of similar glyphs. They may expose some functions used in glyphs in other blocks.
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define-macro symbol-block : syntax-rules
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`[symbol-block @name @::steps] : let [t : env.newt] : dirty `[begin [let : set @t : begin @::[steps.map formOf]] [progress @name] @t]
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### Necessary macros
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# A glyph construction is a function which "modifies" a glyph.
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define-macro glyph-construction : syntax-rules
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`[glyph-construction @::steps] {'.syntactic-closure' `[lambda [] [begin \\
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local currentGlyph this
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begin @::[steps.map formOf]
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return nothing
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]] env}
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# Remap Glyph's methods to macros in order to simplify writing
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define-macro set-width : syntax-rules
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`[set-width @::args] {'.syntactic-closure' `[currentGlyph.set-width @::args] env}
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define-macro start-from : syntax-rules
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`[start-from @::args] {'.syntactic-closure' `[currentGlyph.start-from @::args] env}
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define-macro line-to : syntax-rules
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`[line-to @::args] {'.syntactic-closure' `[currentGlyph.line-to @::args] env}
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define-macro curve-to : syntax-rules
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`[curve-to @::args] {'.syntactic-closure' `[currentGlyph.curve-to @::args] env}
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define-macro cubic-to : syntax-rules
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`[cubic-to @::args] {'.syntactic-closure' `[currentGlyph.cubic-to @::args] env}
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define-macro include : syntax-rules
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`[include glyphs.(@name) @::args] : dirty `[includeGlyphPart currentGlyph glyphs @name @::args]
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`[include @::args] {'.syntactic-closure' `[currentGlyph.include @::args] env}
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define-macro set-anchor : syntax-rules
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`[set-anchor @::args] {'.syntactic-closure' `[currentGlyph.set-anchor @::args] env}
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define-macro apply-transform : syntax-rules
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`[apply-transform @::args] {'.syntactic-closure' `[currentGlyph.apply-transform @::args] env}
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define-macro reverse-last : syntax-rules
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`[reverse-last @::args] {'.syntactic-closure' `[currentGlyph.reverse-last @::args] env}
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define-macro eject-contour : syntax-rules
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`[eject-contour @::args] {'.syntactic-closure' `[currentGlyph.eject-contour @::args] env}
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define-macro tag-contour : syntax-rules
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`[tag-contour @::args] {'.syntactic-closure' `[currentGlyph.tag-contour @::args] env}
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define-macro retag-contour : syntax-rules
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`[retag-contour @::args] {'.syntactic-closure' `[currentGlyph.retag-contour @::args] env}
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define-macro assign-unicode : syntax-rules
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`[assign-unicode @code] {".syntactic-closure" `[begin \\
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currentGlyph.assign-unicode @code
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set unicodeGlyphs.(currentGlyph.unicode.((currentGlyph.unicode.length - 1))) currentGlyph
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] env}
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define [includeGlyphPart cg gs nm] : begin
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if [not gs.(nm)] : throw : new Error "Glyph \(nm) is not defined, which is used for \(cg.name)."
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return : cg.include.apply cg [{gs.(nm)}.concat [{}.slice.call arguments 3]]
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### COMMON FUNCTIONS
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define [mix a b p] : a + (b - a) * p
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define [linreg x0 y0 x1 y1 x] : y0 + (x - x0) * (y1 - y0) / (x1 - x0)
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define [bilinear x0 x1 y0 y1 z00 z01 z10 z11 x y] : linreg
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* y0
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linreg x0 z00 x1 z10 x
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* y1
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linreg x0 z01 x1 z11 x
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* y
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define [clamp l h x] : if (x < l) l : if (x > h) h x
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define [fallback] : begin
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for [local j 0] (j < arguments.length) [inc j] : if (arguments.(j) !== nothing) : return arguments.(j)
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return nothing
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define [TempFont] {.glyf {} .head {.} .hhea {.} ."OS/2" {.} .name {.} .post {.}}
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define [normalize a] : begin
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local m : Math.hypot a.x a.y
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return {.x (a.x / m) .y (a.y / m)}
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define [anchorDeriv] : begin
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local h {.}
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foreach a [items-of arguments] : foreach k [items-of [Object.keys a.anchors]] : begin
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set h.(k) : new Anchor a.anchors.(k).x a.anchors.(k).y a.anchors.(k).type a.anchors.(k).mbx a.anchors.(k).mby
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return {.anchors h}
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# contour tagging
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define [tagged tag component] : begin
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set component.tag tag
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return component
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export as build : define [buildFont para recursive recursiveCodes] : begin
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define variantSelector para.variantSelector
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define font this
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define glyphList font.glyf
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define glyphs {.}
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define unicodeGlyphs {}
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define UPM 1000
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# Progress indicator
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define [progress status] : if [not recursive] : begin
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console.log " \(font.name.uniqueSubFamily) : Done \(status)"
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if (global && global.gc) : global.gc
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# Key metrics
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define WIDTH para.width
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define SB para.sb
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define CAP para.cap
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define XH para.xheight
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define DESCENDER : fallback para.descender (XH - CAP)
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# Key metrics for symbols
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local parenTop ((XH * 0.625) + (CAP - XH) * 2.5)
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local parenBot ((XH * 0.625) - (CAP - XH) * 2.5)
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local parenMid [mix parenTop parenBot 0.5]
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local operTop : mix parenMid parenTop 0.8
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local operBot : mix parenMid parenBot 0.8
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# Transform constructors
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define [Italify angle shift] : begin
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local slope [Math.tan ([fallback angle para.italicangle] / 180 * Math.PI)]
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return : new Transform 1 slope 0 1 [fallback shift : -slope * parenMid] 0
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define [Upright angle shift] [Italify angle shift :.inverse]
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define [Scale sx sy] : new Transform sx 0 0 [fallback sy sx] 0 0
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define [Translate x y] : new Transform 1 0 0 1 x y
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define [Rotate angle] : new Transform [Math.cos angle] (-[Math.sin angle]) [Math.sin angle] [Math.cos angle] 0 0
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define globalTransform : Italify para.italicAngle
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define deGlobalTransform : inverse globalTransform
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define CORRECTION_HX : [fallback para.contrast 1] / [Math.sqrt (1 - globalTransform.yx * globalTransform.yx)]
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# Orient parameters
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define UPWARD {.x (-CORRECTION_HX) .y 0}
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define DOWNWARD {.x CORRECTION_HX .y 0}
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define RIGHTWARD {.x globalTransform.yx .y 1}
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define LEFTWARD {.x (- globalTransform.yx) .y (-1)}
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# Style parameters
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define O para.overshoot
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define OX para.overshootx
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define OXHOOK para.oxhook
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define HOOK para.hook
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define AHOOK para.ahook
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define SHOOK para.shook
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define RHOOK para.rhook
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define JHOOK para.jhook
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define FHOOK para.fhook
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define HOOKX para.hookx
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define SMOOTH para.smooth
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define SMALLSMOOTH para.smallsmooth
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define STROKE para.stroke
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define CONTRAST para.contrast
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define DOTSIZE : fallback para.dotsize STROKE
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define PERIODSIZE : fallback para.periodsize DOTSIZE
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define BARPOS : fallback para.barpos 0.5
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define GBARPOS : fallback para.gbarpos 0.5
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define PBARPOS : fallback para.pbarpos 0.5
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define EBARPOS : fallback para.ebarpos BARPOS
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define OVERLAYPOS para.overlaypos
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define FIVEBARPOS para.fivebarpos
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define LONGJUT para.longjut
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define JUT para.jut
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define VJUT para.vjut
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define ACCENT para.accent
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define ACCENTX para.accentx
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define CTHIN : fallback para.cthin 0.75
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define CTHINB : fallback para.cthinb 0.5
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define SLAB para.slab
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define TAILADJX : WIDTH * 0.2
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define TAILADJY : XH * 0.25
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define LBALANCE : LONGJUT * 0.04
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define IBALANCE : fallback para.ibalance (LONGJUT * 0.04)
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define JBALANCE : fallback para.jbalance 0
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define JBALANCE2 : fallback para.jbalance2 (STROKE / 2 + LBALANCE)
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define TBALANCE : fallback para.tbalance JBALANCE
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define TBALANCE2 : fallback para.tbalance2 TBALANCE
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define RBALANCE : fallback para.rbalance (JBALANCE * 0.3)
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define RBALANCE2 : fallback para.rbalance2 0
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#define SBALANCE : fallback para.sbalance 0.52
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define FBALANCE : fallback para.fbalance 0
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define ONEBALANCE : fallback para.onebalance 0
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# derived metrics
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define OXE : OX - O
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define FULLWIDTH : if para.cjkSpacing (WIDTH * 2) WIDTH
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define VSTROKE : STROKE * CONTRAST
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define ESS : STROKE * [fallback para.essx CONTRAST]
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define XO : XH - O
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define CAPO : CAP - O
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define HALFSTROKE : STROKE / 2
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define RIGHTSB : WIDTH - SB
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define FWRSB : FULLWIDTH - SB
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define MIDDLE : WIDTH / 2
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define FWMIDDLE : FULLWIDTH / 2
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define CAPMIDDLE : CAP / 2
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define CAP_SMOOTH : CAP - SMOOTH
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define DOTRADIUS : DOTSIZE / 2
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define PERIODRADIUS : PERIODSIZE / 2
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define SIDEJUT : JUT - HALFSTROKE * CORRECTION_HX
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define SMOOTHA : SMOOTH - globalTransform.yx * para.smoothadjust
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define SMOOTHB : SMOOTH + globalTransform.yx * para.smoothadjust
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define SMALLSMOOTHA : SMALLSMOOTH - globalTransform.yx * para.smoothadjust
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define SMALLSMOOTHB : SMALLSMOOTH + globalTransform.yx * para.smoothadjust
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define CORRECTION_VX globalTransform.yx
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define CORRECTION_VS : STROKE * globalTransform.yx
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define CORRECTION_OMIDX : globalTransform.yx * 1.3
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define CORRECTION_OMIDS : STROKE * CORRECTION_OMIDX
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# Blackness parameters
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# We will estimate blackness using lower-case 'e'
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define WHITENESS : ((XH - STROKE * 3) * (RIGHTSB - SB) * (1 / 3)) / (XH * (RIGHTSB - SB))
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define [adviceBlackness crowdedness] : Math.min STROKE ((RIGHTSB - SB) * (1 - WHITENESS) / (crowdedness * CORRECTION_HX))
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define MVERTSTROKE : adviceBlackness : fallback para.lllcrowdedness (3 + 1 / 3)
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define OVERLAYSTROKE : adviceBlackness 3.75
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define OPERATORSTROKE : adviceBlackness 3.2
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define SHOULDERFINE : adviceBlackness 10
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define SUPERNESS : fallback para.superness 2
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define [superxy x] : Math.pow (1 - [Math.pow x SUPERNESS]) (1 / SUPERNESS)
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define [adviceSSmooth y sign] : begin
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local ss : y * 0.22 + STROKE * 0.22 + 0.02 * (RIGHTSB - SB)
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return : ss + sign * globalTransform.yx * para.smoothadjust * (ss / SMALLSMOOTH)
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define [adviceGlottalStopSmooth y sign] : ((y - STROKE) * 0.25 + STROKE / 2) + sign * globalTransform.yx * para.smoothadjust
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define [shoulderMidSlope _fine _stroke _dir] : 0.5 * CORRECTION_HX * ([fallback _stroke STROKE] - [fallback _fine SHOULDERFINE]) / [fallback _stroke STROKE] + [fallback _dir 1] * globalTransform.yx
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# Anchor parameters
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define BASE Anchor.BASE
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define MARK Anchor.MARK
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define AS_BASE 'AS-BASE'
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define [tm anchor] : return : new Anchor
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* (anchor.x * globalTransform.xx + anchor.y * globalTransform.yx + globalTransform.x)
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* (anchor.x * globalTransform.xy + anchor.y * globalTransform.yy + globalTransform.y)
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* anchor.type
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define markAboveLower {.anchors {.above [tm : new Anchor MIDDLE XH BASE]}}
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define markAboveCap {.anchors {.above [tm : new Anchor MIDDLE CAP BASE]}}
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define markBelowLower {.anchors {.below [tm : new Anchor MIDDLE DESCENDER BASE]}}
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define markBelowZero {.anchors {.below [tm : new Anchor MIDDLE 0 BASE]}}
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define markToprightLower {.anchors {.topright [tm : new Anchor RIGHTSB XH BASE]}}
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define markToprightCap {.anchors {.topright [tm : new Anchor RIGHTSB CAP BASE]}}
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define markBottomrightLower {.anchors {.bottomright [tm : new Anchor RIGHTSB DESCENDER BASE]}}
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define markBottomrightZero {.anchors {.bottomright [tm : new Anchor RIGHTSB 0 BASE]}}
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define [StdAnchorGroup] : begin
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local a : anchorDeriv.apply null arguments
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set a.anchors.overlay : new Anchor
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* [mix a.anchors.below.x a.anchors.above.x OVERLAYPOS]
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* [mix a.anchors.below.y a.anchors.above.y OVERLAYPOS]
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* BASE
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set a.anchors.slash : new Anchor
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* [mix a.anchors.below.x a.anchors.above.x 0.5]
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* [mix a.anchors.below.y a.anchors.above.y 0.5]
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* BASE
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return a
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define capitalMarks : StdAnchorGroup markAboveCap markBelowZero markToprightCap markBottomrightZero
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define bMarks : StdAnchorGroup markAboveCap markBelowZero markToprightCap markBottomrightZero
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define eMarks : StdAnchorGroup markAboveLower markBelowZero markToprightLower markBottomrightZero
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define pMarks : StdAnchorGroup markAboveLower markBelowLower markToprightLower markBottomrightLower
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define ifMarks : StdAnchorGroup markAboveCap markBelowLower markToprightCap markBottomrightLower
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### Glyph slots and dependency profile generation (used for recursive subfonts)
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local dependencyProfile {.}
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local nTemp 0
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local nPending 0
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local pickHash : if recursive
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then : let [h {.}] : begin
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foreach j [items-of recursive] : set h.(j) j
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set nPending recursive.length
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* h
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else nothing
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define [getDependencyProfile glyph] : begin
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local dp {}
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foreach d [items-of glyph.dependencies] : begin
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dp.push d
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if dependencyProfile.(d): foreach [k : items-of dependencyProfile.(d)] : dp.push k
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return dp
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define [create-glyph name actions] : piecewise
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(name && actions) : begin
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if (pickHash && nPending <= 0) : begin
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console.log " *** Done recursive build for \[if (recursive.length > 3) [recursive.slice 0 3 :.concat {'...'} :.join ','] [recursive.join ',']] in \(font.name.uniqueSubFamily)"
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throw {.glyfMap glyphs}
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if (pickHash && [not pickHash.(name)]) : return nothing
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define glyphObject [new Glyph name]
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glyphList.push glyphObject
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glyphs.(name) = glyphObject
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glyphObject.set-width WIDTH
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glyphObject.gizmo = globalTransform
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actions.call glyphObject
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set dependencyProfile.(name) : getDependencyProfile glyphObject
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dec nPending
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return glyphObject
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true : begin
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local actions arguments.0
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local glyphObject [new Glyph ('.temp-' + [set nTemp (nTemp + 1)])]
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glyphObject.set-width WIDTH
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actions.call glyphObject
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return glyphObject
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### Spiro constructions
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# Basic knots
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local [object
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g4 g2 corner flat curl close end straight
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widths heading unimportant important
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alsothru alsothruthem bezcontrols quadcontrols archv arcvh complexThru
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dispiro spiro-outline] : spirokit.SetupBuilders : object globalTransform CONTRAST STROKE Glyph para SUPERNESS
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###### HERE WE GO!
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### Metadata
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# Font names
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set font.name.fontFamily para.family
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set font.name.fontSubFamily para.style
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set font.name.preferredFamily para.family
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set font.name.preferredSubFamily para.style
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set font.name.uniqueSubFamily "\(para.family) \(para.style) \(para.version) (\(para.codename))"
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set font.name.version para.version
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set font.name.fullName : if (para.style != 'Regular') (para.family + ' ' + para.style) para.family
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set font.name.postScriptName : font.name.fullName.replace [regex ' ' 'g'] '-'
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set font.name.copyright para.copyright
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set font.name.licence para.licence
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# Weight, width and slantness
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set font.'OS/2'.usWeightClass para.weight
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set font.'OS/2'.bProportion 9 # Monospaced
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set font.'OS/2'.bWeight : 1 + para.weight / 100
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set font.'OS/2'.fsSelection : [if para.isBold 32 0] + [if para.isItalic 1 0] + [if ([not para.isBold] && [not para.isItalic]) 64 0] + 128
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set font.'OS/2'.sFamilyClass : 8 * 0x100 + 9
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set font.post.isFixedPitch 1
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set font.head.macStyle : [if para.isBold 1 0] + [if para.isItalic 2 0]
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# Metric metadata
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# Note: we use 1000upm in design, and (1000 * upmsacle)upm in production, to avoid rounding error.
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let [asc : 1250 * CAP / (CAP - DESCENDER)] [desc : 1250 * DESCENDER / (CAP - DESCENDER)] : begin
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set font.head.unitsPerEm 1000
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set font.hhea.ascent asc
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set font.'OS/2'.usWinAscent asc
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set font.'OS/2'.sTypoAscender asc
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set font.hhea.descent desc
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set font.'OS/2'.usWinDescent [Math.abs desc]
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set font.'OS/2'.sTypoDescender desc
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set font.hhea.lineGap (CAP * 0.2)
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set font.'OS/2'.sTypoLineGap (CAP * 0.2)
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set font.'OS/2'.sxHeight XH
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set font.'OS/2'.sCapHeight CAP
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set font.post.italicAngle (0 - para.italicangle)
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# Necessary notdef glyph
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create-glyph '.notdef' : glyph-construction
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start-from SB 0
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line-to SB CAP
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line-to RIGHTSB CAP
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line-to RIGHTSB 0
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start-from (SB + STROKE) STROKE
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line-to (RIGHTSB - STROKE) STROKE
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line-to (RIGHTSB - STROKE) (CAP - STROKE)
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line-to (SB + STROKE) (CAP - STROKE)
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# Space
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create-glyph 'space' : glyph-construction
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set-width WIDTH
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assign-unicode ' '
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include eMarks
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### HERE WE GO
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$$include 'glyphs/common-shapes.patel'
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$$include 'glyphs/overmarks.patel'
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# Unified letters
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$$include 'glyphs/letters-unified-basic.patel'
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$$include 'glyphs/letters-unified-extended.patel'
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# Numbers
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$$include 'glyphs/numbers.patel' ; progress 'Numbers'
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# Symbols
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$$include 'glyphs/symbol-punctuation.patel'
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$$include 'glyphs/symbol-math.patel'
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$$include 'glyphs/symbol-letter.patel'
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$$include 'glyphs/symbol-geometric.patel'
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$$include 'glyphs/symbol-other.patel'
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# Autobuilds
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$$include 'glyphs/autobuilds.patel'
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set font.glyfMap glyphs
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return font |